package cn.itcast.n4_共享模型_管程;

import lombok.extern.slf4j.Slf4j;

/**
 * @program: juc
 * @description:
 * @author: flyduck
 * @create: 2024-09-11 09:38
 **/
@Slf4j(topic = "c.Test03_使用synchronized配合面向对象思想解决问题_一个自增一个自减结果不为0")
public class Test03_使用synchronized配合面向对象思想解决问题_一个自增一个自减结果不为0 {
    public static void main(String[] args) throws InterruptedException {
        Room room = new Room();
        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 5000; i++) {
                room.increment();
            }
        },"t1");

        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 5000; i++) {
                room.decrement();
            }
        },"t2");

        t1.start();
        t2.start();
        t1.join();
        t2.join();
        log.debug("结果为:{}", room.getCounter());//0

    }
}

class Room{
    private int counter = 0;

    public void increment(){
        synchronized (this) {
            counter++;
        }
    }

    public void decrement(){
        synchronized (this) {
            counter--;
        }
    }

    public int getCounter() {
        synchronized (this) {
            return counter;
        }
    }
}
